2 44 
Journal of Agricultural Research 
Vol. II, No. 3 
Table II. —Comparison of developmental periods of Texas boll weevils and Thurberia 
weevils in buds of Hibiscus and of Texas boll weevils in cotton 
Thurberia weevils on Hibiscus, 
Texas boll weevils on Hibiscus. 
De¬ 
velop¬ 
mental 
period 
for 
Texas 
boll 
weevils 
in 
cotton 
squares 
at same 
time. 
Eggs deposited. 
Adults 
emerged. 
De¬ 
velop¬ 
mental 
period. 
Eggs deposited. 
Adults 
emerged. 
De¬ 
velop¬ 
mental 
period. 
September 21. 
September 24. 
September 30. 
October 8.. . 
October 10.. 
October 15.. 
Days. 
U 
16 
15 
September 24. 
September 27. 
October 12.. 
October 14. . 
Days. 
18 
17 
Days. 
Average. 
16 
* 7 - 5 
u 
From Table II it is seen that there was little difference between the 
Thurberia weevils and Texas boll weevils in the Hibiscus buds. The 
average developmental period of native Texas boll weevils from eggs 
deposited in cotton squares during this same time is offered for com¬ 
parison. 
SUMMARY 
Table III shows a summary of the longevity of the various series. 
Table III. —Summary of longevity of boll weevils on various Malvaceae tested. 
Period of 
experi¬ 
ment. 
Food plant. 
Series and remarks. 
Maxi¬ 
mum. 
Longevity. 
Average. 
Male. 
Fe¬ 
male. 
Weighted. 
Days. 
Days. 
Days. 
Days. 
May 13 to 
Sphaeralcea 
Hibernated boll weevils Collected in 
15 
7- 3 
10. 0 
8. s 
May 28. 
lindheimeri. 
field. 
Do. 
Boll weevils reared from cotton 
8 
4-3 
4- 1 
4. 2 
squares. 
May 13 to 
Callirrhoe involucrata. 
Boll weevils collected in the field_ 
20 
June 2. 
May 16 to 
Callirrhoe pedata. 
.do. 
26 
id. 0 
IO. 2 
12 1 
June 11. 
June 13 to 
Boll weevils reared from cotton 
j 21 
5- 3 
3-6 
4.4 
July 11. 
squares. 
June 27 to 
Hibiscus syriacus. 
Reared boll weevils fed on buds only. 
s 
3- 2 
4. 2 
3- 7 
July 1. 
June 27 to 
Reared boll weevils fed on blooms 
40 
30. 0 
16. 0 
25- 3 
Aug. 5. 
only. 
June 16 to 
Boll weevils collected in the field 
36 
it, j 
16. 8 
16. 0 
July 22. 
and fed on buds, blooms, and 
■ L J' J 
fruit. 
June 15 to 
.do .. 
Boll weevils reared from cotton 
43 
is- I 
3 
19. 2 
July 28. 
squares and fed on buds, blooms, 
i 
and fruit; spring series. 
Aug. 28 to 
Boll weevils reared from cotton 
26 
0. 0 
19- 3 
14- 1 
Sept. 23. 
squares and fed cn buds, blooms, 
and fruit; summer series. 
Sept. 5 to 
Anthonomus grandis thurberiae 
30 
22. e 
22. 5 
Oct. 8. 
reared from Thurberia bolls and 
fed on blooms only. 
